Sole cementing machine



Dec. 8, 1931. OPACITY 1,835,079 I SOLE CEMENTING MACHINE Filed Sept. 7,1929 2 Sheets-Sheet 1 INVENTOR PAUL OPA any ATTORNEY Dec. 8, 1931. IQPACITY 1,835,079

SOLE CEMENTING MACHINE Filed Sept. 7, 1929 2 Sheets-Sheet 2 INVENTOR PAu/ OPAC/TY ATTORNEY Patented Dec. 8, 1931 UNITED STATES PATENT OFFICEPAUL OPACITY, OF NEWARK, NEW JER SEY, ASSIGNOR TO JOHN GITZ, JR., 0]?WEST ORANGE, NEW JERSEY SOLE CEMENTING MACHINE Application filedSeptember 7, 1929. Serial No. 390,883.

repair work and is of such simple construction that while adapted foruse in the larger shops it will also be within the reach of the manconducting a small repair business in his own shop.

Shoes, particularly those which have been worn to the extent ofrequiring new soles, diifer materially one from another in the matter offlatness of the bottom. Considering the shoe in the position it usuallyassumes on a repairing last with the bottom of the sole uppermost, manyshoes hump up at the portion occupied by the ball of the foot, the toeportion drooping. Others have the toe portion raised and the ball low.The illustrated form of my improved machine is particularly designed foruse in cementing half soles to shoes, and to carry out one principalobject of my invention, namelythat of applying uniform pressure over thesurface of the sole while the cement is setting, irrespective of thishumping up or lowness of the ball and the drooping or raised toe. Thisobject is attained by means of a floating plate on the top of the lastand a floating pressure plate combined with means for pressing thesetogether and firmly .yet elastically pressing the sole to theshoe andholding it in position. One of my purposes in designing this machine wasto furnish the repair man a simple, inexpensive, and eflicientimplement, well suited to his needs in cementing soles to shoes.

In the drawings onepractica-ble form of my invention is illustrated inwhich Figure 1 is a side elevation, partly in longitudinal section, ofmy improved machine shown as applying pressure to a half sole beingcemented to the sole ofa shoe.

F ig. 2 is a side elevation of my improved last, illustrating theadjustability afforded by the floating sole.

Fig. 3 is a viewlooking down in the front of the body of the last.

Fig. 4 is a front view of the machine illustrated in Fig. 1. Y

Fig. 5 is a rear view of such machine, and

Fig.6 is a view looking down on the head of the jack or last supportingstandard.

The body of the last is designated by the reference character 7, and isshown having a depending shank 8, terminating in the usual tapered plug9, of non-circular cross section.

Before describing the details of construction of the last and the otherportions of the machine, the jack or supporting standard which, whilespecially designed for use with my improved machine, is capable ofsupporting other lasts, will receive attention.

A member 10, which for want of a better name I shall term a cap, has. aflange 11 adapted to surround the upper end of an upright bar or tube12, there being a shoulder 13 above the flange adapted to rest on theupper end to the tube 12. Three set screws 14 are shown carried by theflange for removably securing the cap to the tube. The upper part of thecap 10 is open and forms a circular cavity. A socket member 18 has areduced stem portion 19 adapted to fit in the circular cavity in theupper part ofthe cap 10 and has a shoulder 20 for resting on the top ofthe cap. A boss. 17 is formed on the side of the cap for carrying asetscre w'lfl, such set screw having a conical end 15 adapted to extendinto the circular cavity and engage the stern portion 19 when this isseated therein. 1

The walls 21, of the upper part of the member 18 are shown, see Fig. 6,as forming a tapering socket, preferably cruciform in cross section sothat it may receive the plug 9 in such a manner as to support the last 7in four different cardinal positions. The set screw 16, or its conicalend 15, is cooperative with a number of indentations 22, preferablyeight in number, to permit angular adjustment of the socket member 18upon the cap 10. Index points 23'are shown for assisting the workman inbringing the indentations in register with the end 15 of the set screw.

For illustrating the method of using my improved machine a shoe 24 isshown in operative position on the last 7. The shoe has a sole 25 towhich there is to be cemented in some suitable or well .known manner asole portion 26. The toe portion of the upper or vamp 27 terminates atthe opening 28. The front portion 29 of the body of the last 7 isshorter than the toe of the shoe and carries a forwardly extendinginterchangeable sole supporting plate 30, the length of the plate beingsufficient to underlie the portion of the sole 25 of the shoe to whichthe sole layer 26 is to be cemented. This front portion 29 is formed onthe upper side into side flanges 31, substantially flat on top. In eachof the flanges there is shown formed two notches 32, for receiving feet33, four in number in the illustration, dependent from the plate 30. Thelower ends of these feet are preferably rounded and located to stand androck on the upper edge of a lifter 34, pivoted to the last 7 at 35, thelifter conforming to the body of the last. Two of the feet 33, arelocated slightly forwardly of the ball engaging end 36 of the plate, andtwo are placed rearward 1y of the toe engaging end 37.

Differences in the flatness of the fore parts of shoes are accommodatedby this faculty for rocking or tilting. Should the shoe be high at theball the end 36 of the plate, under the application of pressure, risesas in the full line position in Fig. 2. On the other hand, should thetoe be high and the ball low, the end 37 rises asin the dotted lineposition. When normal flatness prevails, the plate 30 assumestheposition shown in Fig. 1.

A forked lever 38, pivoted to the last at 39, is provided for raisingthe lifter 34. When the front end of the lever is free, its cam shapedrear end 40 is elevated and engages and raises the lifter holding itsufliciently elevated that the entire toe portions of the last mayfreely enter the toe of the shoe being operated upon. When the front endof the lever 38 is raised it engages the lifter well forwardly of itspivot 35 and forces the plate 30 up against the downward force exertedby the presser 41, presently to be described.

Presser 41 comprises a rigid case conforming to the general shape of theouter surface of a shoe sole. It is shown having a flange 42 extendingalong both sides, within which an elastic cushion 43 is to advantagedisposed. Across the rear the flange is preferably absent, giving thecushion pad freedom to conform at this region to its work.

The presser is interchangeably mounted on a truss or frame work 44,having two side members 45, spaced apart and conforming on their underside to the upper surface of the presser 41'. A boss 46 formed on theupper side of the presser is adapted to enter the space between the sidemembers 45, and, when the screw 47 and plate 48 are backed offsufficiently, permit longitudinal shifting and also a self-adjustingmovement conforming to the tilting of the last plate 30.

At the rear the truss frame 44 curves downwardly toward the shankportion 49 of a shoe, and forwardly of the position to be occupied bythe shoe heel 50. A lever 51 is shown straddling the shank 8 of thelast, and pivoted to it at 52. The forward arm of the lever comprisestwo bars 53, lying on opposite sides of the lever 38, and their endsadapted to be engaged at the top and bottom respectively by studs 54 and55 carried by the lever 38, so that movement of the outer end of onelever in either direction moves the outer end of the other lever in thereverse direction. The proportion of the arms of the lever 51, and thelocation of the studs 54 is such that when the outer end of lever 38 israised the outer end 56 of lever 51 is lowered powerfully and to asmaller extent. The outer or rearward end 56 of the lever is notched atthe lower side. Side arms 57 are formed at the rear end of the trussframe for carrying a bail 58.

Deep holes are formed in the arms 57 for receiving the inturned ends 59of the wire forming the bail. The sides of the bail are sufficientlywide apart to clear the shoe and adjacent parts of the machine and atthe lower portion converge forming at the end a narrow loop 60 forpassing over the lever end 56 and engaging the notches formed in itslower side. At its front the truss frame 44 is narrowed to a singleportion 61 to which is pivoted at 62 a lever having a long end 63 and ashorter transverse end 65. A bail 66 has the ends 67 of the wire fromwhich it is formed inturned and enter holes formed in the lever wherethe parts 63 and are joined. The lower end of the bail is narrowed intoa loop for passing over the end of the lever 38, the lower edge of thislever being notched, as at 68, for preventing the bail slipping insetting up the machine preparatory to applying pressure.

The operation of the form of my machine above described is as follows:Assuming the last and its associated parts to be in the Fig. 2 positionwith the outer end of lever 38 down, its cam rear end raised and holdingthe lifter 34 raised out of the way of the shoe 24 when this is beingplaced on the last. The lowering of the outer or front end of lever 38raises the rear end of lever 51. A shoe, as 24, upon the sole 25 ofwhich the sole 26 has been placed together with a suitable intermediatecoating of cement, is put on the last. In some cases the sole 26 will beplaced on the shoe after it is on the last, this being a matter ofpreference with the operator.

The shoe now being ready for the application of pressure, the operatorholds the pressure device raised above the shoe, passes the lower end 60of the bail 58 below the lever end 56, causing it to enter one oranother of the notches, for adjusting its effective length, then withthe tightening lever 63 raised passes the lower end of the bail 66 overthe ward or forward on the truss frame 44 tobring it into properregistry with the sole 26.

The plate is now free to adjust itself to the position of the shoe sole,as is also the plate 41. The tightening lever 63 is then turned backwardupon its pivot 62, raising the bail 66 and the engaged end of the lever38. This raises the lifter which engages the feet 33 of plate 30 whichat this time are rest- I ingon its upper surface. The raising of thelever 38 lowers the end 56 ofleveri 51, and draws down the rear end of.the truss frame 44. At the same time the upward movement of the lever 38having been arrested by the engagement of the upper edges of the lifterwith the lower faces of the flanges 31 formed on the last body thefurther movement of the lever 63 is converted into downward movement ofthe presser plate 41. The elasticity of the cushion 43 comes into playas the pressure increases. Preferably the lever 2 *63 snaps down andengages the truss frame,

the location of its pivot 62 and of the bail connection 67 being solocated that there is sufiicient overthrow to hold the free end of thelever 63 down.

After a sufficient length of time has elapsed to permit the cement toset, the operator takes hold of the lever 63, and turns it on its pivot62. This releases the pressure on the bails 66 and 58 and permits theirremoval from the levers 38 and 5 1. In some cases the bail 66 is firstremoved from lever 38, permitting the lowering of' this lever and theconsequent raising of the end 56 of lever 51, thereby facilitating therelease of the bail end 60 from it.

It is to be understood that I do not limit myself to the preciseconstruction illustrated herein since various changes may be made inpractice, within the scope of the claims, without departing from thespirit of my invention.

Having thus described my invention, I claim and desire to secure byLetters Patent: 1. In a shoe sole cementing machine, the combinationwith a last, the sole of its toe and ball portions being formed as aplate, and a lifter for the plate, the interengagement "between theplate and its lifter being such that the plate can tip up at the toe ortip up at the ball, of a presser cooperative with the last, and meansfor concurrently actuating the presser and the lifter.

52. In a shoe sole cementing machine, the combination with a last, thesole of its toe and ball portions being formed as a plate, and a lifterfor the plate, there being front and back feet dependent from the plateand adapted to be engaged by the lifter, the interengagement between thefeet and the lifter being such that the plate can tip up at the toe ortip up at the ball, of a presser cooperative with the last, and meansfor concurrently actuating the pressure and the lifter.

3. In a shoe sole cementing machine, the

combination with a last body having side flanges at the front portion, aseparate plate forming the sole at the toe and ball portions, each ofthese flanges being formed with a notch at the front and at the rear andthere being feet dependent from the plate at its front and rear andadapted tovmove up and down through the notches, of a lifting membermounted for guidance on the last body and having portions movable up anddown below the flanges in position to engage the feet and raise andlower the plate within a range of movement determined by the position ofthe lower and upper faces of the flanges, the plate being adapted to tipup at the toe raising its front feet off the lifter, and to tip up atthe ball raising its rear feet off the lifter, and means for actuatingthe lifter. 4. In a shoe sole cementing machine, the combination with alast body having side flanges at the front portion, a separate plateforming the sole at the toe and ball portions, each of these flangesbeing formed with a notch at the front and at the rear and there beingfeet dependent from the plate at its front and rear and adapted to moveup and down through the notches, of a lifting member mounted forguidance on the last body and having portions movable up and down belowthe flanges in position to engage the feet and raise and lower the platewithin a range of movement determined by the position of the lower andupper faces of the flanges, the plate being adapted to tip up at the toeraising its front feet off the lifter, and to tip up at the ball raisingits rear feet off the lifter, and means for actuating the lifter,comprising a lever fulcrumed on the last body and located in positionwhen moved in either direction to engage and raise the lifter.

5. In a shoe sole cementing machine, the combination with a last bodyhaving side flanges at the front portion, a separate plate forming thesole at the toe and ball portions, each of these flanges being formedWith a notch at the front and at the rear and there being feet dependentfrom the plate'at its front and rear and adapted to move up and downthrough the notches, of a lifting member mounted for guidance on thelast body and having portions movable up and down below the flanges inposition to engage the feet and raise and lower the plate within a rangeof movement determined by the posilast body near one end and located inposition when moved up at its shorter end to partly raise the lifter andwhen moved up at its longer end to raise the lifter against the lowerfaces of the flanges, a second lever fulcrumed on the last body having ashorter end directed backwardly and a longer end directed forwardly anddisposed at the side of the longer arm of the first mentioned lever,there being means for interconnecting the levers, a pressure deviceconstructed and adapted for overlying the last, bails carried by thepressure device for engaging the longer arm of the first lever and therearward arm of the second lever, and means for drawing up on one of thebails.

6. In a shoe sole cementing machine, the combination with a last bodyhaving side flanges at the front portion, a separate plate forming thesole at the toe and ball portions, each of these flanges being formedwith a notch at the front and at the rear and there being feet dependentfrom the plate at its front and rear and adapted to move up and downthrough the notches, of a lifting member mounted for guidance on thelast body and having portions movable up and down below the flanges inposition to engage the feet and raise and lower the plate within a rangeof movement determined by the position of the lower and upper faces ofthe flanges, the plate being adapted to tip up at the toe raising itsfront feet off the lifter,- and to tip up at the ball raising its rearfeet off the lifter, and means for actuating the lifter, comprising alever fulcrumed on the last body near one end and located in positionwhen moved up at its shorter end to partly raise the lifter and whenmoved up at its longer end to raise the lifter against the lower facesof the flanges, a second lever fulcrumed on the last body having ashorter end directed backwardly and a longer end directed forwardly anddisposed at the side of the longer arm of the first'mentioned lever,there being means for interconnecting the levers, a pressure devicecomprising a truss frame having two spaced apart members upwardly curvedat the center portion, a plate formed on its under side for engaging thesole of a shoe when placed in the last, the upl per side conforming tothe curve of the spaced apart members and carrying a boss located in thespace between them, means for loosely holding the boss between themembers, a bail carried by the rear of the truss on the last body havinga shorter end directed backwardly and a longer end directed for- Wardlyand disposed at the side of the longer arm of the first mentioned lever,there being means for interconnecting the levers, a pressure a deviceconstructed and adapted for overlying the last, bails carried by thepres sure device for engaging the longer arm of the first lever and therearward arm of the second lever, and means for drawing up on one of thebails.

In witness whereof, I hereby aflix my signature this 5th day of Sept.,1929.

PAUL OPACITY.

